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The woodcreepers are generally forest birds of Central and South America. Most species occur in rainforests, with the centre of diversity of the subfamily being the Amazon Basin . As many as 19 species of woodcreeper may co-occur in some areas of the Amazon, although in other rainforests, such as those in Costa Rica, the numbers are much lower.
The bout starts with a series of pure-tone whistles and these are followed by the main part of the song, a number of variable sequences that often incorporate snatches of song mimicked from other species of bird and various naturally occurring or man-made noises. The structure and simplicity of the sound mimicked is of greater importance than ...
Birds have one of the most complex respiratory systems of all animal groups. [77] Upon inhalation, 75% of the fresh air bypasses the lungs and flows directly into a posterior air sac which extends from the lungs and connects with air spaces in the bones and fills them with air. The other 25% of the air goes directly into the lungs.
Our network analyzed over 500 photographs of bird species provided by the Macaulay Library at the Cornell Lab of Ornithology, whose extensive media collection helps researchers identify and study ...
The use of bird skins to document species has been a standard part of systematic ornithology. Bird skins are prepared by retaining the key bones of the wings, legs, and skull along with the skin and feathers. In the past, they were treated with arsenic to prevent fungal and insect (mostly dermestid) attack.
In the classic lekking system, male territories are in visual and auditory range of their neighbours. In an exploded lek, males are further away from one another than they would be in a classical lek. Males in an exploded lek are outside visual range of one another, but they stay within earshot. [35]
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Female in Melbourne. The female has a white throat and the male has a black throat. The magpie-lark is a small to medium size bird, reaching 25 to 30 cm (9.8 to 11.8 in) long when fully grown, or about the same size as a European common blackbird, and boldly pied in black and white; the weight range is 63.9 to 118 g (2.25 to 4.16 oz) for males, and 70 to 94.5 g (2.47 to 3.33 oz) for females. [15]